I recall that when the FCC first authorized the use of ASCII code for RTTY in addition to Baudot in 1980, the ham radio press made it appear that this was a really big deal.
I've Googled information on ASCII RTTY, and find no indication that is being used to any significant extent. ARRL states that their teleprinter bulletins are transmitted in Baudot, AMTOR, and *in ASCII only as time allows*. Why did ASCII fail to catch on? Just curious! 73, John, K9MM